Chapter 10

A Normal Distribution is
1. symmetrical
2. bimodal
3. skewed
4. uniform
A normal distribution with a mean of 100 and a standard deviation of 10 has 5% of the values above:
1. 101.645
2. 101.96
3. 116.45
4. 119.6
The same distribution has 97.5% of values below:
1. 101.645
2. 101.96
3. 116.45
4. 119.6
For a standard normal distribution, the area to the right of z=+1.5 is:
1. 0.0668
2. 0.1469
3. 0.8531
4. 0.9332
For a standard normal distribution, the area to the left of z=+1.05 is:
1. 0.0668
2. 0.1469
3. 0.8531
4. 0.9332
For a standard normal distribution, the area to the right of z= -2.03 is:
1. 0.01072
2. 0.02118
3. 0.97882
4. 0.98928
For a standard normal distribution, the area between z= -2 and z=+1 is:
1. 0.18095
2. 0.31905
3. 0.61430
4. 0.81905
For a standard normal distribution, the area between z= +0.5 and z=+1 is:
1. 0.1503
2. 0.4667
3. 0.5333
4. 0.8497
IQ scores are said to be normal with a mean of 100 and a standard deviation of 10. What percentage of people will have an IQ of over 120:
1. 2.275%
2. 11.51%
3. 15.87%
4. 22.75%
For the same IQ distribution, what percentage will be below 95?
1. 3.85%
2. 30.85%
3. 50%
4. 69.15%